| Standardization field | Electrical engineering
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| Technical committee | BAS/TC 30- Electric cables |
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| Term (EN) | group velocity |
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| Definition (EN) | The velocity vector at a point, in a propagation medium, of a signal which may be ideally represented by two superimposed sinusoidal waves of equal amplitude and slightly different frequencies approaching a common limiting value.
Notes
1 — The magnitude of the group velocity is equal to the derivative of frequency with respect to the reciprocal of the wavelength.
2 — In an isotropic medium the group velocity equals the phase velocity if the phase constant is a linear function of the angular frequency.
3 — Each waveguide mode has its own particular group velocity. |
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| Term (FR) | |
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| Definition (FR) | |
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| Term (DE) | |
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| Definition (DE) | |
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| Term (BS) | |
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| Definition (BS) | |
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| Term (HR) | |
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| Definition (HR) | |
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| Term (SR) | grupna brzina |
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| Definition (SR) | Vektor brzine u tački, u medijumu prostiranja, signala koji se može idealno predstaviti pomoću dva superponirana sinusoidalna talasa jednake amplitude i neznatno različitih frekvencija koji se približavaju zajedničkoj graničnoj vrijednosti.
Napomene
1 – Magnituda grupne brzine je jednaka derivaciji frekvencije u odnosu na recipročnu vrijednost talasne dužine.
2 – Kod izotropnog medijuma grupna brzina je jednaka faznoj brzini ukoliko je fazna konstanta linearna funkcija ugaone frekvencije.
3 – Svaki mod talasovoda ima svoju određenu grupnu brzinu. |
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| Date | 2017-08-09 |
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| Standards | BAS IEC 60050-731:2017 |
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